Difficulty tuning Medium: min subset deductions 2 A Medium grid must force at least this many two-clue subset moves. Raise for meatier Mediums. Hard: min overlap deductions 2 A Hard grid must force at least this many two-clue overlap moves (plus at least one subset move). Extreme: min what-if deductions 2 An Extreme grid must force at least this many what-if moves: assume a square, watch a clue break. The deepest logic in the game. Extreme: min chain depth 2 At least one what-if must need a chain this long (in counting steps). 1-step chains feel like overlap moves; 2+ guarantees a genuinely deep moment. Capped by MAX_WHAT_IF_FIRINGS . Insane: min either-way deductions 0 Insane grids always exceed Extreme's chain cap. Raise this to additionally demand either-way moves: pivots where both hypotheses survive yet agree on another square. The rarest logic in the game; expect closest-match flags above 1. Slider changes regenerate the grid.…